Table 4. Hazard ratio with respect to different stages.

TNM stages	Hazard ratio (95% CI)	P value
Stage I	Reference	–
Stage II	0.07 (0.01–0.33)	0.0006
Stage III	0.10 (0.04–0.24)	<0.0001
Stage IV	0.15 (0.08–0.30)	<0.0001

CI, confidence interval.